Модуль:GetField

Для документации этого модуля может быть создана страница Модуль:GetField/doc

local p = {}

local cache = {}
local entryCache = {}

local function parse_indexed_part(part)
    local key, idx = string.match(part, "^(.-)%[(%d+)%]$")
    if key then
        return key, tonumber(idx)
    end
    local num = tonumber(part)
    if num then
        return nil, num
    end
    return part, nil
end

local function get_by_path(tbl, path)
    if not tbl or path == "" then return nil end
    local cur = tbl
    for part in string.gmatch(path, "([^%.]+)") do
        local key, idx = parse_indexed_part(part)
        if key and key ~= "" then
            if type(cur) ~= "table" then return nil end
            local nextCur = cur[key]
            if nextCur == nil then
                nextCur = cur["!type:" .. key]
            end
            cur = nextCur
        end
        if idx then
            if type(cur) ~= "table" then return nil end
            cur = cur[idx]
        end
        if cur == nil then return nil end
    end
    return cur
end

local function is_array(t)
    if type(t) ~= "table" then return false end
    local max = 0
    local count = 0
    for k in pairs(t) do
        if type(k) ~= "number" then
            return false
        end
        count = count + 1
        if k > max then max = k end
    end
    return max > 0
end

local function format_value(v)
    if v == nil then return "" end
    local t = type(v)
    if t == "string" or t == "number" or t == "boolean" then
        return tostring(v)
    elseif t == "table" then
        local max = 0
        local hasNonNumber = false
        for k in pairs(v) do
            if type(k) ~= "number" then
                hasNonNumber = true
                break
            else
                if k > max then max = k end
            end
        end
        if not hasNonNumber and max > 0 then
            local out = {}
            for i = 1, max do
                out[#out+1] = format_value(v[i])
            end
            return table.concat(out, ", ")
        else
            local out = {}
            for k, val in pairs(v) do
                out[#out+1] = tostring(k) .. ": " .. format_value(val)
            end
            return table.concat(out, ", ")
        end
    else
        return tostring(v)
    end
end

function p.get(frame)
    local args = frame.args or {}
    local id = args[1] or ""
    local pagePath = args[2] or ""
    local keyPath = args[3] or ""

    if pagePath == "" then return "" end

    local baseUser = "IanComradeBot/"
    local moduleName = "Module:" .. baseUser .. pagePath .. "/data"

    local data = cache[moduleName]
    if not data then
        local ok, loaded = pcall(mw.loadData, moduleName)
        if not ok or not loaded then return "" end
        data = loaded
        cache[moduleName] = data
    end

    local entryKey = moduleName .. "|" .. (id ~= "" and id or "default")
    local entry = entryCache[entryKey]
    if not entry then
        if id ~= "" then entry = data[id] end
        if entry == nil then entry = data["default"] end
        entryCache[entryKey] = entry
    end
    if entry == nil then return "" end

    if keyPath == "" then
        return format_value(entry)
    end

    local value = get_by_path(entry, keyPath)
    return format_value(value)
end

function p.flattenField(frame)
    local args = frame.args or {}
    local id = args[1] or ""
    local pagePath = args[2] or ""
    if id == "" or pagePath == "" then return "" end

    local baseUser = "IanComradeBot/"
    local moduleName = "Module:" .. baseUser .. pagePath .. "/data"

    local data = cache[moduleName]
    if not data then
        local ok, loaded = pcall(mw.loadData, moduleName)
        if not ok or not loaded then return "" end
        data = loaded
        cache[moduleName] = data
    end

    local entry = data[id] or data["default"] or {}
    if type(entry) ~= "table" then return "" end

    local parts = {}
    local function walk(tbl, prefix)
        local keys = {}
        for k in pairs(tbl) do keys[#keys+1] = k end
        table.sort(keys, function(a, b) return tostring(a) < tostring(b) end)
        for _, k in ipairs(keys) do
            local v = tbl[k]
            local key = (prefix == "" and tostring(k) or prefix .. "." .. tostring(k))
            if type(v) == "table" then
                walk(v, key)
            else
                parts[#parts+1] = key .. "=" .. tostring(v)
            end
        end
    end

    walk(entry, "")
    return table.concat(parts, "|")
end

return p